Trigonometric Identities Worksheet With Answers Page 12
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2513-1 Trigonometric Identities
Simplify each expression.
28.
SOLUTION:
29.
SOLUTION:
30.
SOLUTION:
31.
SOLUTION:
32.
SOLUTION:
33.
SOLUTION:
34. SUN The ability of an object to absorb energy is related to a factor called the emissivity e of the object. The
emissivity can be calculated by using the formula
, where W is the rate at which a person’s skin absorbs
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energy from the Sun, S is the energy from the Sun in watts per square meter, A is the surface area exposed to the
Sun, and θ is the angle between the Sun’s rays and a line perpendicular to the body.
a. Solve the equation for W. Write your answer using only sin θ or cos θ.
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